Telegraph system.



W. M. BRUCE, JR.

TELEGRAPH SYSTEM.

APPLICATION FILED NOV. 7, 1913 1,145,229. Patented July 6, 1915;

2 SHEETS-SHEET I- W. M. BRUCE, JR.

TELEGRAPH SYSTEM,

APPLICATION FILED NOV. 7, 1913.

1,145,229. Pa tented July 6, 1 15.

2 SHEETS-SHEET 2.

" brating the same to or from a moving tape I STATES AT WILLIAM M.BRUCE, In, orsPnIneFIELn, oIIIo, ASSIGNORTO THE UNITED TELE- GRAPI-L8cCABLE co v PA'NY, or SPRINGFIELD, orrro, A CORPORATION or OHIO.

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Application filed November 7, 1913.

' To all whom it may concern Be it known that I, WILLIAM M. BRUoE,

Jr., a citizen of the UnitedStates, residing at Springfield, in thecounty of Clark and. State of Ohio, have'invented' certain new anduseful Improvements in Telegraph Systems, of which the following is aspecification. I

My invention relates to improvements intelegraphy and particularlyrelates to a system, of telegraphing with alternating currents.

In the accompanying drawings, Figure 1' 1s a dlagrarn showing a systemembodying my invention. Fig. 2*is a diagram showing a modification ofthe same. Llke parts are represented by similar characters of referencein the several views.

In the said drawings, a represents analternating current generator, onepole of which is grounded at g and the otherconnected by wire orconductorb tocontact 5". 0 is an ordinary telegraph key connected thegenerator d'as well as to themake andbreak impulses which may be made bythe key 0. The relay f is provided with an armature spring 72, adaptedto engage the forward contact h which is connected through wire k? to anelectro-magnet k of a receiving and recording device R; thence by wire72; to battery B and wire k to the'armature h.. This electro-magnet h?is also so constructed that'it will respond to the vibrations of thearmature k. This electro-magnet k is'arranged to operate a recording pen;0 by vit. The tape 25 is arranged to be moved by a suitable mechanismsuch as a clock circuit gearing as indicated at 3', 7'', 3' so as tomove at a uniform speed when the mechanism is started so that the pen7), as it is vibrated to and from the tape, will produce a series ofimpressions thereon. I

In order to control the movement ofthe tape from the relay f, I providea branch circuit leading from the wire 71, by wire It to a slow orsluggish magnet is; thence by wire it to wire b so thatthe vibrations ofthe relay 7 will energize the magnet 76.

Specificationof Letters Patent.

Serial No. 799,812.

, raa aam g a v v This magnet 70, however, is made slowl or sluggish bythe use of a;copperijacket-or otherwise so thatsolong-as'therelay f isoperated in a fairly rapid mannenthemag I net 70 will remalnenergizedandonly become,

deener'gized after the relayf has ceased to I operate for a definiteinterval of time.- :Thisl I magnet 70' is, by means of "an armature-7%and a pawl-lever k adapted to release the" clockmechanism j to cause thetape to move. j

If the tape, moving at a uniform speed,

' is impressed by the pen p at each movement, w

of the armature h in response to the 'alter-, Y

nations ofcurrent and these alternations are I sufficiently rapid, theresult would be a series of small dots. If the-making'of these: dots isinterrupted by interrupting the current,

a space would occur and these interruptions, together with the dots,would makelongf and short groups or a series of dots repremade in theusual dots and dashes of an ordinary recording instrument, I arrange thetravel of'the tape in a given ratio to the alternations of thecurrentand I also make the pen 1) of a .suflicient length in therdirection ofthe travel of the .tapeso that; the? result willbeagseries of short andlong dashes instead of groups ofsmall dots.

For illustration in using an ordinary sixf teen-cycle current, thearmature hwill vi-' p brate thirty-two times nergsecond whichwillse'ntingthe ordinary Morse alphabet! 1111- I order, however, that thealphabet may be.-

cause the pen 1) to vibrate a similar number w k of times. In such case,I arrange the tape to travel'at the rate ofvan inch per fsecond whichwould make, by the alternations of the current,-thirty-two dots to eachinch: ofv tape whichwould be separatedby asimilar I number of'spaces, adot-and space [occupying a thirty+second of aninch. Now, in,

order that these dots may make a continu y v one line in the event thatthe armature vibrates in response to the alternationsfofthe currentonly,I makethe end of the pen p of a suflicient length in -the direction-0fthe travelof the tapeso that at eachimpres i sion, the back edge of thepen would engage the back of theprevious.simpressionand I thus make acontinuous line. Then, manipulating the key 0 accordance Wltll thewell-known Morse or other alphabet, the if result would be a series ofshort and long dashes separated by the usual spaces in ex- I actaccordance with the alphabetadopted.

' OFFIC, j

By using the slow magnet is, which will be energized whenever thecircuit is closed at the armature h but shall remain energized allow thepawl lever 70 to engage the tapeoperating mechanism and stop the same.In Fig, 2, I have shown a modification in which the relay f, through itsarmature it, operates an electro-magnet a which controls a vibratinglever Z operating in a toothed Wheel mwhich in turn vibrates a lever 41carrying a pen 2? which operates on a tape 25, in a manner alreadydescribed. Ihe toothed wheel m may be operated by any suitable mechanismsuch as a clock mechanism or otherwise, the toothed lever Z being formedat the top with arms Z and Z to produce an escapement device similar toan ordinary clock mechanism. The tape IE will be arranged to move, asbefore described, in connection with the pen 2?, and the vibrations ofthe lever Z, in response to the relay f, will cause a. succession ofdots and dashes and spaces on the tape t, as before described. It isobvious that the same arrangement of the slow magnet for stopping andstarting the operation of the tape mechanism may be employed if desired.

An interrupted current having interruptionsof substantially the samefrequency as the frequency of an alternating current may be used insteadof an alternating current under some circumstances with fairly goodresults, and, where an alternating current is described, it is intendedto cover either alternating or interrupted current.

Having thus described my invention, I claim:

1. In a telegraph system having a relay in circuit with an alternatingcurrent and adapted to respond to the alternations as well as theinterruptions of said current, a local circuit controlled by said relayand an ele'ctromagnet operating in response to said relay, a recordingdevice controlled by said electro -ma-gnet embodying a tape whosemovement is arranged in ratio to the alternations of said current, and amarking de vice adapted to vibrate in response to the alternations andproduce a continuous mark on said tape and by interruptions in saidCopies of this patent may be obtained for current make long and shortdashes and spaces, as described.

2. In a telegraph system, a relay in circuit with an alternating currentsupply, a circuit breaker and condenser, said relay being adapted to beoperated by the alternations of said current as well as theinterruptions therein, a local circuit lincluding a magnet controlled bysaid relay} a recording device operated by said electro magnet embodyinga tape, means for moving said tape and a slow magnet also operated bysaid relay adapted to be energized and remain energized so long as saidrelay is operated, and means controlled. by said slow magnet to stop andstart said tape, as specified.

3. In a telegraph system for alternating currents embodying a relaywhich responds to the alternations as well as to the interruptions ofsaid current, a local circuit having an electro-magnet controlled bysaid relay, a recording device operated in part by said electro-magnetand in part by other operating mechanism and a magnet also in circuitwith said relay adapted to be energized and remain energized while saidrelay is operating in fairly rapid succession, and means controlled bysaid magnet for starting'and stopping said mechariism in said recordingdevice.

4c. In a telegraph system, a %ource of alternating current supply, a CLrrent interrupter and a relay in circuit with said current supply, saidrelay being constructed to respond to the alternations of current aswell as to interruptions therein, a recording device controlled by saidrelay consisting in part of a marking instrument adapted to vibrate inresponse to the alternations and in part of a moving surface againstwhich said marking device operates, the movement of said surface and thelength of the marking instrument being so proportioned that in theordinary vibrations from the alternations of the current the markinginstrument will close the spaces between the successive impressions thusmaking a continuous line and leave spaces between the said impressionsin response to the interruptions of the current.

In testimony whereof, I have hereunto set my hand this 30th day oflOctober, 1913.

WILLIAM M. BRUCE, JR.

Witnesses:

CHAs. I. WELCH, ESTHER E. PFEIFER.

five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

